I picked up a used jet wash cheap. The guy I got it from said the gun was leaking. I was hoping it’d be a seal or o-ring.
Further investigation revealed it was the plastic valve body cracked.
The parts aren’t available separately and new guns are £35 and the cracking valves are common place.
I need to practice machining so I thought I’d have a go at making one out of brass.
Some round brass stock was all I had so I set to it.
The old and the new
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Fitted. I’ll test it tomorrow to see if it works.
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An update as I’m sure you’re all waiting with bated breath

It worked a treat.